A full gallon of 5% chlorine bleach in your pool adds, at most, 4ppm FC. Considering most pools consume about 2-4ppm per day due to sunlight loss, your pool would have zero FC in it for most of the time between chlorine additions or simply be maintaining what ever low level of FC there is. Without accurately knowing your stabilizer levels (CYA), there is no way to know if this amount of chlorine is sufficient. This would leave your pool open to algae blooms and poor water quality. As well, there is no reason to "shock" a pool regularly if you follow the methods taught here. TFP does not operate on "rules of thumb's" here...that is what the pool industry uses. TFP operates on exact and specific information that is obtained by using a professional grade test kit. All of the chemical additions to pool water should be based on solid information, not guesswork.
Adding liquid chlorine only is certainly the right way to go BUT, as Jim said, if you are not regularly testing your water then you really have no idea what is in it and how much chlorine, if any, to add.
Your next step should be ordering one of the high quality, professional test kits that are recommended by this site (you can get them from many different vendors online) and learning how to use that to guide your pool care decisions. While it may seem burdensome at first to constantly test and adjust your water chemistry, in the long run it saves time and money. Leaving chemical additions up to guesswork is a recipe for a green & cloudy pool with lots of time wasted on trying to get it under control again.